Diplomats — reference index 3
- Boris A. Bakhmeteff — Russia
- Boris Biancheri-Chiappori — Italy
- Boris E. Skvirsky — Russia
- Budi Bowoleksono — Indonesia
- Bulat K. Nurgalyev — Kazakhstan
- Bülend Uşaklıgil — Türkiye
- C. Onou — Russia
- C. S. A. Ritchie — Canada
- Calvin Coolidge
- Camillo Romano Avezzana — Italy
- Carl Edward Vilhelm Piper — Sweden
- Carl Lewenhaupt — Sweden
- Carl von Eisendecher — Germany
- Carlos Alberto de Icaza González — Mexico
- Carlos Alfredo Bernardes — Brazil
- Carlos Alfredo Lazary Teixeira — Brazil
- Carlos Alzamora Traverso — Peru
- Carlos Fernando Leckie Lobo — Brazil
- Carlos García Vélez — Cuba
- Carlos García-Bedoya Zapata — Peru
- Carlos Gibson — Peru
- Carlos José Pareja Ríos — Peru
- Carlos Manuel de Céspedes — Cuba
- Carlos Manuel Muñiz — Argentina
- Carlos Manuel Sada Solana — Mexico
- Carlos María de Alvear — Argentina
- Carlos Martins Pereira e Souza — Brazil
- Carlos Martínez de Irujo y Tacón — Spain
- Carlos Ortiz de Rozas — Argentina
- Carlos Ricardo Martins Ceglia — Brazil
- Carlos Westendorp — Spain
- Cayetano Romero — Mexico
- Cecilia Nahón — Argentina
- Celso Diniz — Brazil
- Celso Pastor de la Torre — Peru
- César Barros Hurtado — Argentina
- César Canevaro — Peru
- César Guillermo Atala Nazzal — Peru
- Chai Zemin — China
- Chan Heng Chee — Singapore
- Chang Lee-wook — Korea
- Chang Myon — Korea
- Chang Yin Tang — China
- Chao-Chu Wu — China
- Charles Bagot — United Kingdom
- Charles Bankhead — United Kingdom
- Charles Evans Hughes
- Charles Lucet — France
- Charles Vaughan — United Kingdom
- Charles-Édouard Pontois — France
- Charles-François-Frédéric de Montholon — France
- Charles-Jules de Menou — France
- Chatry de La Fosse — France
- Chen Lanbin — China
- Chengting T. Wang — China
- Chester A. Arthur
- Chiang Kai-shek
- Cho Hyun-dong — Korea
- Cho Min-hui — Korea
- Cho Tae-yong — Korea
- Cho Yoon-je — Korea
- Choi Young-jin — Korea
- Chough Pyung-ok — Korea
- Chow Shu-Kai — China
- Christian A. Herter
- Chung Il-kwon — Korea
- Cipriano Coronel Zegarra — Peru
- Claës Bonde — Sweden
- Claudio Bisogniero — Italy
- Colin Powell
- Colville Barclay — United Kingdom
- Comte Cassini — Russia
- Condoleezza Rice
- Conrad Traverso — Argentina
- Conrad-Alexandre Gérard — France
- Cordell Hull
- Cosme de la Torriente — Cuba
- Count de Sartiges — France
- Cui Tiankai — China
- Cyro de Freitas Valle — Brazil
- Cyrus Vance
- Dagoberto Rodríguez Barrera — Cuba
- Dame Karen Pierce — United Kingdom
- Daniel Ayalon — Israel
- Daniel Webster
- David Erskine — United Kingdom
- David Gustaf Anckarloo — Sweden
- David Ivry — Israel
- David MacNaughton — Canada
- David Ormsby-Gore — United Kingdom
- De Vaugelas — France
- Dean Gooderham Acheson
- Dean Rusk
- Deng Hongbo — China
- Dennis Richardson — Australia
- Denys Sienik — Ukraine
- Derek Burney — Canada
- Diego de Gardoqui — Spain
- Diego Felipe Medus — Argentina
- Diego Ramiro Guelar — Argentina